Bug: trying to do Edit Runes just brings up the window border with no content.
Trigger: I pressed Edit during the "declare champ" stage, and I think it was just as the final warning countdown for that was happening. I selected Jax, hit edit, and then it did some sort of alert i think, due to the timer, and then edit was canceled.
Had this happen a few games in a row as well
Same happened to me, only I didn't realise the window was invisible, I thought it had just closed itself. Then I started clicking to lock in the champion I was picking, hoping I could sort out the runes later. Since the invisible window was there, I couldn't click on the "Lock in" button, resulting in a dodge queue block. Very annoying.
I've also hit that bug. The way to reproduce on my side is simply to open the rune pages, create a new page while in champ select and the window will never show again, although it can be closed. Unfortunately, intermittent without any known common factors.
Made a thread about it two days ago as well, leaving it here in-case one of the devs sees this and need more confirmation: https://boards.na.leagueoflegends.com/en/c/bug-report/FPAb8tEN-client-loadout-selection-rune-page-editing-bugged-out
